Here are some excellent free android productivity apps to help make you more efficient.

1. Evernote

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Evernote is an easy-to-use, free app that helps you remember everything across all of the devices you use. Stay organized, save your ideas and improve productivity. Evernote lets you take notes, capture photos, create to-do lists, record voice reminders–and makes these notes completely searchable, whether you are at home, at work, or on the go.  

2. Textgram – Instagram Text

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Create beautiful pictures out of any text and share them with your friends on Facebook, Instagram, Whatsapp, etc.. or save them in your gallery.

3. Assistant

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Speaktoit Assistant is a virtual assistant for Android devices. Your very own customizable Assistant awaits your commands – answering your questions, performing tasks, notifying you about important events, and making your daily routine easier (and, often, more fun along the way).

4.  Google Drive

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* With Google Drive, you can store all your files in one place, so you can access them from anywhere and share them with others * Use the Google Drive Android app to access your photos, documents, videos and other files stored on your Google Drive
5. CamScanner -Phone PDF Creator
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Turn any Smartphone into a Scanner with CamScanner for Intelligent Document Management CamScanner is an intelligent document management solution for individuals, small businesses, organizations, governments and schools. It is the perfect fit for those who want to scan, sync, edit, share and manage various contents on all devices.